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Figure 4 | Respiratory Research

Figure 4

From: Maintained inspiratory activity during proportional assist ventilation in surfactant-depleted cats early after surfactant instillation: phrenic nerve and pulmonary stretch receptor activity

Figure 4

Recordings of P aw , V T , P eso , PSR f imp, and PNA during PAV after lung lavage and after instillation of surfactant. After lung lavage, peak PSR f imp was reached earlier than peak PNA amplitude, resulting in a lower I:E ratio than after instillation of surfactant. Peak PSR was lower after than before surfactant instillation, giving a higher PNA amplitude and longer PNA duration. The changes in esophageal pressure did not alter PSR f imp. Inspiratory time (T insp ) and expiratory time (T exp ) are marked in the recordings of V T . Black arrows point to the concomitant change in PNA when peak PSR f imp was reached. The duration (A) and amplitude (B) of PNA are indicated in the recordings of PNA. Note the late rebound of esophageal pressure after lung lavage (white arrows; please see further in the text for explanation).

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Respiratory Research

ISSN: 1465-993X

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